A light-receiving device array includes a photodiode array that is provided with plural light-receiving sections each of which includes a first conductivity type electrode and a second conductivity type electrode, and a carrier, wherein the carrier includes plural pair of electric lines each of which is formed from a first electric line connected to the first conductivity type electrode of each light-receiving section, and a second electric line connected to the second conductivity type electrode of the light-receiving section, a first ground electrode that extends between one pair of electric lines of the plural pair of electric lines and a pair of electric lines adjacent to the one pair of electric lines, and a second ground electrode that is formed on a part of the rear surface and is electrically connected to the first ground electrode.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A light-receiving device array comprising: a photodiode array, being provided with a plurality of light-receiving sections on a semiconductor substrate, each of the light-receiving sections comprising a first conductivity type electrode and a second conductivity type electrode and converting an input optical signal into an electric signal; and a carrier, having a front surface on which the photodiode array is disposed so as to be connected thereto, and a rear surface located on an opposite side to the front surface, the carrier comprising: a plurality of pair of electric lines, each of the pair of electric lines being formed from a first electric line connected to the first conductivity type electrode of the corresponding light-receiving section and being formed on a part of the front surface, and a second electric line connected to the second conductivity type electrode of the corresponding light-receiving section and being formed on a part of the front surface adjacent to the first electric line; a first ground electrode being formed on a part of the front surface and extending between one pair of electric lines of the plurality of pair of electric lines and a pair of electric lines adjacent to the one pair of electric lines; and a second ground electrode being formed on at least a part of the rear surface and being electrically connected to the first ground electrode.
2. The light-receiving device array according to claim 1 , wherein the plurality of pair of electric lines are a first pair of electric lines which is the one pair of electric lines and a second pair of electric lines which is the pair of electric lines adjacent to the one pair of electric lines, wherein the plurality of light-receiving sections are a first light-receiving section which is connected to the first pair of electric lines and a second light-receiving section which is connected to the second pair of electric lines, and wherein, in the first pair of electric lines and the second pair of electric lines, electric lines disposed inside with respect to the first ground electrode extending therebetween are all the first electric lines.
3. The light-receiving device array according to claim 1 , wherein the carrier further includes an upper surface located between the front surface upper edge and the rear surface upper edge, wherein both the first electric line and the second electric line of each pair of electric lines extend toward the front surface upper edge, and are formed on a part of the upper surface over the upper edge, wherein the first ground electrode extends toward the front surface upper edge between the one pair of electric lines and the pair of electric lines adjacent to the one pair of electric lines and is formed on a part of the upper surface over the upper edge.
4. The light-receiving device array according to claim 2 , wherein the carrier further includes an upper surface located between the front surface upper edge and the rear surface upper edge, wherein both the first electric line and the second electric line of each pair of electric lines extend toward the front surface upper edge, and are formed on a part of the upper surface over the upper edge, wherein the first ground electrode extends toward the front surface upper edge between the one pair of electric lines and the pair of electric lines adjacent to the one pair of electric lines and is formed on a part of the upper surface over the upper edge.
5. The light-receiving device array according to claim 1 , wherein the first ground electrode extends respectively between any two pairs of electric lines arranged so as to be adjacent to each other.
6. The light-receiving device array according to claim 5 , wherein the carrier further includes an upper surface located between the front surface upper edge and the rear surface upper edge, wherein both the first electric line and the second electric line of each pair of electric lines extend toward the front surface upper edge, and are formed on a part of the upper surface over the upper edge, and wherein the first ground electrode extends toward the front surface upper edge respectively between any two pairs of electric lines arranged so as to be adjacent to each other, and is formed on a part of the upper surface over the upper edge.
7. The light-receiving device array according to claim 3 , wherein a portion where the first electric line of each pair of electric lines is formed on a part of the upper surface and a portion where the second electric line of the pair of electric lines is formed on a part of the upper surface are electrically insulated from each other by a cutting groove.
8. The light-receiving device array according to claim 7 , wherein a portion where the first ground electrode is formed on apart of the upper surface is included in an inner cutting groove, is electrically insulated from electric lines disposed inside with respect to the corresponding portion in the one pair of electric lines and the pair of electric lines adjacent to the one pair of electric lines by outer cutting grooves enlarging to both sides of the inner cutting groove.
9. The light-receiving device array according to claim 7 , wherein a portion where the first ground electrode is formed on a part of the upper surface is electrically insulated from electric lines disposed inside with respect to the corresponding portion in the one pair of electric lines and the pair of electric lines adjacent to the one pair of electric lines by cutting grooves.
10. The light-receiving device array according to claim 6 , wherein a portion where the first electric line of each pair of electric lines is formed on a part of the upper surface and a portion where the second electric line of the pair of electric lines is formed on a part of the upper surface are electrically insulated from each other by a cutting groove.
11. The light-receiving device array according to claim 10 , wherein each portion where the first ground electrode is formed on a part of the upper surface is included in an inner cutting groove, and is electrically insulated by outer cutting grooves enlarging to both sides of the inner cutting groove, from electric lines disposed inside with respect to the corresponding portion in the corresponding two pairs of electric lines so as to be adjacent to each other and be located further outside to both sides of the inner cutting groove respectively.
12. The light-receiving device array according to claim 10 , wherein each portion where the first ground electrode is formed on a part of the upper surface is electrically insulated by cutting grooves from electric lines disposed inside with respect to the corresponding portion in the corresponding two pairs of electric lines so as to be adjacent to each other and be located at both sides of the corresponding portion.
13. The light-receiving device array according to claim 1 , wherein each of the light-receiving sections further includes a PN junction that receives light incident to a rear surface of the semiconductor substrate, wherein the first conductivity type electrode is electrically connected to one side of the PN junction, and wherein the second conductivity type electrode is electrically connected to the other side of the PN junction.
14. The light-receiving device array according to claim 1 , wherein the carrier further includes one or a plurality of through-holes that penetrate through an inside of a region where the first ground electrode is formed on the front surface and an inside of a region where the second ground electrode is formed on the rear surface, and wherein the light-receiving device array further comprises one or a plurality of third ground electrodes that are respectively formed at lateral surfaces of the one or the plurality of through-holes and come into contact with the first ground electrode and the second ground electrode.
15. The light-receiving device array according to claim 1 , wherein the carrier further includes a bottom surface located between the front surface lower edge and the rear surface lower edge, and wherein the light-receiving device array further includes a third ground electrode that comes into contact with the first ground electrode over the front surface lower edge, comes into contact with the second ground electrode over the rear surface lower edge, and is formed on a part of the bottom surface.
16. The light-receiving device array according to claim 6 , wherein a portion where the first ground electrode is formed on a part of the upper surface extends toward the rear surface upper edge, and comes into contact with the second ground electrode over the rear surface upper edge.
17. An optical receiver module comprising the light-receiving device array according to claim 1 .
18. An optical transceiver comprising the optical receiver module according to claim 17 .
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
May 7, 2012
December 9, 2014
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